The count below identifies party affiliations at the beginning of the first session of this Congress, and includes members from vacancies and newly admitted states, when they were first seated. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section.

Senators were elected every two years, with one-third beginning new six-year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election. In this Congress, Class 1 meant their term ended with this Congress, requiring re-election in 1922; Class 2 meant their term began in the last Congress, requiring re-election in 1924; and Class 3 meant their term began with this Congress, requiring re-election in 1926.

Lists of committees and their party leaders, for members (House and Senate) of the committees and their assignments, go into the Official Congressional Directory at the bottom of the article and click on the link (6 links), in the directory after the pages of terms of service, you will see the committees of the Senate, House (Standing with Subcommittees, Select and Special) and Joint and after the committee pages, you will see the House/Senate committee assignments in the directory, on the committees section of the House and Senate in the Official Congressional Directory, the committee's members on the first row on the left side shows the chairman of the committee and on the right side shows the ranking member of the committee.